One of the Three Great Rulers of Nippon. "Silence of the Night" is a title the humans gave him since he only appears during a stormless sundown. Being a quiet and reserved character, little is known about him. His mystery gave birth to legends and rumors. Ancient humans believed that the traditional blade he is carrying was so sharp that he used it to cut up the moon, and at every quiet night, he would slice it little by little to appease the wrath of the ocean until one day a new moon replaces the old one. Another legend said the moon was the eye of an enormous demon where misfortunes came from, and Tsukuyomi is the guardian of the night to protect humans from them.